package Thread;

public class Demo18 {
    private static int sum1 = 0;
    private static int sum2 = 0;
    public static void main(String[] args) throws InterruptedException {
        long beg = System.currentTimeMillis();

        int[] arr = new int[10000];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = i + 1;

        }

        Thread t1 = new Thread(()->{
            for(int i = 0;i < arr.length;i += 2){
                sum1 += arr[i];
            }
        });

        Thread t2 = new Thread(()->{
            for(int i = 1;i < arr.length;i += 2){
                sum2 += arr[i];
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("sum1 = " + sum1);
        System.out.println("sum2 = " + sum2);

        System.out.println("sum = " + (sum1 + sum2));

        long end = System.currentTimeMillis();
        System.out.println("程序运行时间 = " + (end - beg) + " ms ");
    }
}
